2.4-2.6 Review (Alg 2A)

The value of a car is $15,000 and depreciates at a rate of 8% per year. Write an exponential function to model this situation.

• y=8(15,000)^x
• y=15,000(1.08)^x
• y=15,000(0.92)^x
• y=15,000(0.08)^x

• Exponential Growth
• Linear
• Exponential Decay
• Quadratic

Is this exponential growth or decay?

• Growth
• Decay

A tennis tournament begins with 128 players. At the end of round one, there will be 64 players. There are 32 players at the end of round 2 and 16 players remaining after round 3. Write the equation that best models this situation.

• y = -64x + 128

• y = 0.5x + 128

• y = 128(0.5)^x

• y = 128(2)^x

Write the equation of the exponential function for the given graph.

• y = 2(2)^x

• y = 2(1)^x

• y = 1(1/2)^x

• y = 2^x

Determine if the equation y = 15(1.35)^x represents exponential growth or decay and justify.

• Growth, because the growth factor is greater than 1

• Growth, because the initial value is greater than 1

• Decay, because the initial value is larger than the growth factor

• Decay, because the growth factor is less than 1

• Mr. Gantz initially invested $125

• Mr. Gantz's money grows by 13% per year
• After 4 years Mr. Gantz will have about $203.81
• Mr. Gantz earns more money in year one than in year 5

Which represents exponential decay?

• A

• B

• C

• D

• Exponential Growth
• Exponential Decay
• Linear
• Quadratic

Identify the following function. 

• Linear
• Exponential
• Quadratic
• Neither